Compact exercise bike



FIG. 1 is a perspective view of the compact exercise bike showing my new design, wherein the compact exercise bike is in an operating position;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a back elevation view thereof;

FIG. 5 is a left elevation view thereof;

FIG. 6 is a right elevation view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a perspective view of the compact exercise bike showing my new design, wherein the compact exercise bike is in a folded position;

FIG. 10 is another perspective view thereof;

FIG. 11 is a front elevation view thereof;

FIG. 12 is a back elevation view thereof;

FIG. 13 is a left elevation view thereof;

FIG. 14 is a right elevation view thereof;

FIG. 15 is a top view thereof; and,

FIG. 16 is a bottom view thereof.

The broken line showing of portions of the compact exercise device depicts environment and forms no part of the claim. 

CLAIM The ornamental design for a compact exercise bike, as shown and described. 